Eating carbohydrates before bed may promote sleep, because carbohydrates raise brain levels of tryptophan, which
A. is a serotonergic antagonist.
B. is the precursor for the synthesis of serotonin.
C. is a form of serotonin.
D. prevents the reuptake of serotonin.
Answer: B
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Carlito is 5 months old. He loves to grab whatever he can reach, shake it hard, and stuff it in his mouth. What innate characteristic does Carlito share with birds, primates, and many other animals?
a. A desire to explore and manipulate objects b. A fear of novelty and new things c. An understanding of number and the rudiments of language d. An understanding of sibling relationships
International studies have shown that in several countries, smoking is more prevalent among
a. girls than boys. c. equally prevalent. b. boys than girls. d. neither boys nor girls.
The generational regress in physical and psychological traits is called ______.
Fill in the blank(s) with the appropriate word(s).
Research has found an answer to the question of whether people will help out-group and in-group members. People help their in-group members because of _______ and out-group members because of _______
a. rewards; instinct b. instinct; empathy c. empathy; rewards d. empathy; instinct